Re: [PATCH v6 bpf-next 0/6] bpf: enable task local storage for tracing programs

[Alexei Starovoitov]

On Thu, Feb 25, 2021 at 4:04 PM Martin KaFai Lau <kafai@xxxxxx> wrote:
>
> On Thu, Feb 25, 2021 at 03:43:13PM -0800, Song Liu wrote:
> > This set enables task local storage for non-BPF_LSM programs.
> >
> > It is common for tracing BPF program to access per-task data. Currently,
> > these data are stored in hash tables with pid as the key. In
> > bcc/libbpftools [1], 9 out of 23 tools use such hash tables. However,
> > hash table is not ideal for many use case. Task local storage provides
> > better usability and performance for BPF programs. Please refer to 6/6 for
> > some performance comparison of task local storage vs. hash table.
> Thanks for the patches.
>
> Acked-by: Martin KaFai Lau <kafai@xxxxxx>

Applied. Thanks.

9 out of 23 libbpf-tools will significantly reduce the tracing overhead. Hooray!